Re: libpcap regression since 1.5.3

[Daniel Miller <bonsaiviking () gmail com>]

Dario,

Thank you for the bug report. We've seen this behavior as well, and are
tracking it on our Issues page (http://issues.nmap.org/34). Previous
reporters have noted that using the included libpcap 1.5.3 (./configure
--with-libpcap=included) fixes the issue.

Dan

On Mon, Mar 30, 2015 at 9:18 AM, Dario Bertini <berdario () gmail com> wrote:

> When running a SYN scan, a lot of probes are dropped, and this slows
> down the scan terribly:
>
> https://gist.github.com/berdario/9e2eecba0d35f9255f29
>
> If I wait for the scan to finish, subsequent scans are faster
> (probably until the network interface is torn down or anyhow until the
> next reboot)
>
> I reproduced the problem on Nixos, Ubuntu, Kali... and I recompiled
> nmap with different versions of libpcap
>
> 1.5.3 and 1.7.2 (the latest) are affected
> 1.3.0 and 1.4.0 aren't
>
> I can reproduce the problem while connecting to a machine on my
> network, I haven't been able to reproduce the problem by scanning
> localhost
> _______________________________________________
> Sent through the dev mailing list
> https://nmap.org/mailman/listinfo/dev
> Archived at http://seclists.org/nmap-dev/
_______________________________________________
Sent through the dev mailing list
https://nmap.org/mailman/listinfo/dev
Archived at http://seclists.org/nmap-dev/